Great location, close to the overhead rail network ( called the BTS ) the station is about 300 meters away to the left.
The building is just off The Sukumvit which is one of the main roads in Bangkok that leads to the well known shopping malls of MBK, Siam Centre, Paragon, Central Embassy, Terminal 21, The EmQuartier, W District and a lots of the other areas the are famous and infamous. Taxis and Grab / Uber drivers as well as tuktuks will find you and bring you back. Just use Fabian's address guide when you leave the airport and when trying to come back to the apartment, so easy ( hint: print out the address from Fabian's email and show the driver, worked for me)
The apartment is as shown in the pictures with a washing machine if you need it and a ironing board (and iron) a full sized fridge and a coffee machine ( grab some ground coffee from from the coffee shop or mini supermarket Rain Hill across the road or from Tops supermarket across the road and to the left about 200 meters).
Enjoy your stay in Bangkok.